Improvement in ladders



J A. R. W; KNIGHT.

Ladder.

N PETERS. PHOTO -LITH6GRAPN u, WASHINGTON. D1 01 sections.

UNITED STATES PATENT OFFICE.

AARON R. W. KNIGHT, OF PHILADELPHIA, (SOMERTON P. 0.,) PA.

IMPROVEMENT lN LADDERS.

Specification forming part of Letters Patent No. 199,556, dated January22, 1878; application filed October 1, 1877.

To all whom it may concern Be it known that I, AARON R. W. KNIGHT, ofPhiladelphia, (Somerton P. O.,) Pennsyl- Vania, have invented a new anduseful Improvement in Ladders, of which the following is aspecification:

The object of my invention is to construct a cheap, strong, and portableladder of iron or other metal-an object which I attain in the followingmanner, reference being had to the accompanying drawing, in which-Figure l is a front view of my improved ladder; Fig. 2,a verticalsection of the same; and Fig. 3, a perspective view of one of the Theladder consists of sections A, connected together by links B- Each ofthe sections A consists of a single rod or bar of iron orsteel, bent soas to form a rectangular frame, with horizontal portions a a, verticalportions 11 Z), and an eye, d, at each corner.

The ends of the bar are united either by soldering them together, as atw, by the use of a sleeve or socket, as at y, or by eyes, as at 10.

Each of the links B has an eye ateach end,

these eyes being adapted to the adjacent eyes at the corners of thesections A, the connection being such that the ladder can be folded upinto a compact mass when necessary.

The ladder is preferably provided at the top with a triangular link, D,having an eye, 6, by means of which the ladder may be suspended to-anydesired object.

The sections A, made in a single piece, add greatly to the strength ofthe ladder, and can be rapidly and cheaply manufactured by suitablemachinery.

I claim as my invention A ladder in which links B, having eyes at bothends, are combined with sections A, each made of a single rod or bar ofmetal, bent so as to form horizontal portions a a, vertical portions bb, and an eye, at, at each corner, as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

AARON R. W. KNIGHT.

